| Regnum | Animalia |
|---|---|
| Phylum | Chordata |
| Classis | Agnatha |
| Ordo | Heterostraci |
| Subordo | Psammosteida |
| Familia | Pycnosteidae |
| Genus | Pycnosteus |
| Genus authority | Preobrazensky, 1911 |
| Binomial | Pycnosteus tuberculata |
| Binomial authority | Preobrazensky, 1911 |
Pycnosteus is an extinct genus of jawless fish from the Devonian. It is thought to have cruised through vegetation, eating small invertebrates which it knocked loose .[1]
References
- ^ "Pteraspidomorphi: Psammosteida (2): Guerichosteids, Pycnosteids, Psammosteids & Psammolepis". Palaeos Vertebrates
- Fishes of the World by Joseph S. Nelson
- Vertebrate Fossils and the Evolution of Scientific Concepts by W. Sargeant